Keg Coupler Question

[Kenyos]

OK here's a dumb question from a Rookie, Is this a gasket and is it supposed to be here? I was looking at the new rig I got and this rubber piece seems odd. It sits where the Co2 intake is.

 

[EdWort]

It's a one way valve that prevents beer from flowing into your gas line.

 

[Kenyos]

It's a one way valve that prevents beer from flowing into your gas line.

Ahhhh, thanks Ed